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<tr><th colspan="3" align="center">15.7. Modifying Feed and Entry structures</th></tr>
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<div class="sect1" lang="en">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="zend.feed.modifying-feed"></a>15.7. Modifying Feed and Entry structures</h2></div></div></div>
<p>
        <code class="code">Zend_Feed</code>'s natural syntax extends to constructing and modifying feeds and entries as well
        as reading them. You can easily turn your new or modified objects back into well-formed XML for saving
        to a file or sending to a server.
    </p>
<div class="example">
<a name="zend.feed.modifying-feed.example.modifying"></a><p class="title"><b>Example 15.5. Modifying an Existing Feed Entry</b></p>
<div class="example-contents">
<pre class="programlisting">&lt;?php
$feed = new Zend_Feed_Atom('http://atom.example.com/feed/1');
$entry = $feed-&gt;current();

$entry-&gt;title = 'This is a new title';
$entry-&gt;author-&gt;email = 'my_email@example.com';

echo $entry-&gt;saveXML();
        </pre>
<p>
            This will output a full (includes <code class="code">&lt;?xml ... &gt;</code> prologue) XML representation of the
            new entry, including any necessary XML namespaces.
        </p>
<p>
            Note that the above will work even if the existing entry does not already have an author tag. You can
            use as many levels of <code class="code">-&gt;</code> access as you like before getting to an assignment; all of the
            intervening levels will be created for you automatically if necessary.
        </p>
</div>
</div>
<br class="example-break"><p>
        If you want to use a namespace other than <code class="code">atom:</code>, <code class="code">rss:</code>, or <code class="code">osrss:</code>
        in your entry, you need to register the namespace with <code class="code">Zend_Feed</code> using <code class="code">
        Zend_Feed::registerNamespace()</code>. When you are modifying an existing element, it will always
        maintain its original namespace. When adding a new element, it will go into the default namespace if
        you do not explicitly specify another namespace.
    </p>
<div class="example">
<a name="zend.feed.modifying-feed.example.creating"></a><p class="title"><b>Example 15.6. Creating an Atom Entry with Elements of Custom Namespaces</b></p>
<div class="example-contents"><pre class="programlisting">&lt;?php
$entry = new Zend_Feed_Entry_Atom();
// id is always assigned by the server in Atom
$entry-&gt;title = 'my custom entry';
$entry-&gt;author-&gt;name = 'Example Author';
$entry-&gt;author-&gt;email = 'me@example.com';

// Now do the custom part.
Zend_Feed::registerNamespace('myns', 'http://www.example.com/myns/1.0');

$entry-&gt;{'myns:myelement_one'} = 'my first custom value';
$entry-&gt;{'myns:container_elt'}-&gt;part1 = 'first nested custom part';
$entry-&gt;{'myns:container_elt'}-&gt;part2 = 'second nested custom part';

echo $entry-&gt;saveXML();
        </pre></div>
</div>
<br class="example-break">
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